Each aggregation switch is physically connected to all edge switches and participates in multiple EAPS domains. By bundling multiple network connections into a single high-bandwidth link, aggregation switches help. An Aggregation or "Top-of-Rack" switch is designed to connect everything in a rack at high speeds, then have an even bigger pipe out to the rest of the network. The Pro Aggregation does this with it's SFP28 25Gbps ports. In this example, we have a common. IEEE 802. 3ad link aggregation enables you to group Ethernet interfaces to form a single link layer interface, also known as a link aggregation group (LAG) or bundle.